For Sprinters, check the ECU connector plug located behind the glove box; it can sometimes be dislodged by a passenger’s feet. Professional Solutions
: Use a multimeter to test for +12V power on Pin 3 (continuous) and Pin 7 (ignition) of the WSP plug. Repair Methods and Tools
The EIS (ignition) module contains an EEPROM chip (usually 93C56 or 93C66). Over time, voltage fluctuations, low battery cranking, or a failed jump-start can corrupt this data. The "13" code flags because the EIS cannot correctly read the password stored for the ECU.
| Tool | Use | |------|-----| | | Diagnose error codes, resync immo | | KESS/KTAG/MPPS | Read/write ECU flash | | ESL emulator | Replace failed steering lock (plug & play) | | OBDSTAR / FVDI | Program keys, read EZS data |
In simple terms: The key talks to the ignition switch, but the ignition switch isn't successfully telling the engine computer, "It's okay to start."